Home / 1,972.08-2,721.60-1,947.60

Finding the Fourth Proportional to 1,972.08, 2,721.60 and 1,947.60

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Solution

The fourth proportional to 1,972.08, 2,721.60 and 1,947.60 is: 2,687.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.08 : 2,721.60 = 1,947.60 : x
  2. Step 2: Convert to fraction form
    1,972.08/2,721.60 = 1,947.60/x
  3. Step 3: Cross multiply
    1,972.08x = 2,721.60 × 1,947.60
  4. Step 4: Simplify right side
    1,972.08x = 5,300,588.16
  5. Step 5: Solve for x
    x = 5,300,588.16/1,972.08
  6. Step 6: Final answer
    x = 2,687.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.